Re: [PATCH] spi: armada-3700: fix unsigned compare than zero on irq

[Romain Perier]

Hello,

Le 13/12/2016 à 11:28, Colin King a écrit :

From: Colin Ian King <colin.k...@canonical.com>

spi->irq is an unsigned integer hence the check if status is less than
zero has no effect.  Fix this by replacing spi->irq with an int irq
so the less than zero compare will correctly detect errors.

Issue found with static analysis with CoverityScan, CID1388567

Signed-off-by: Colin Ian King <colin.k...@canonical.com>
---
 drivers/spi/spi-armada-3700.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/spi/spi-armada-3700.c b/drivers/spi/spi-armada-3700.c
index e89da0a..4e92178 100644
--- a/drivers/spi/spi-armada-3700.c
+++ b/drivers/spi/spi-armada-3700.c
@@ -800,7 +800,7 @@ static int a3700_spi_probe(struct platform_device *pdev)
        struct spi_master *master;
        struct a3700_spi *spi;
        u32 num_cs = 0;
-       int ret = 0;
+       int irq, ret = 0;

        master = spi_alloc_master(dev, sizeof(*spi));
        if (!master) {
@@ -846,12 +846,13 @@ static int a3700_spi_probe(struct platform_device *pdev)
                goto error;
        }

-       spi->irq = platform_get_irq(pdev, 0);
-       if (spi->irq < 0) {
-               dev_err(dev, "could not get irq: %d\n", spi->irq);
+       irq = platform_get_irq(pdev, 0);
+       if (irq < 0) {
+               dev_err(dev, "could not get irq: %d\n", irq);
                ret = -ENXIO;
                goto error;
        }
+       spi->irq = irq;

        init_completion(&spi->done);

Why don't you change only the type of "irq" in struct a3700_spi ?

Thanks,
Romain